The Ultimate Guide to High Availability with MariaDB

!

You are viewing an old version of this article. View the current version here.

Syntax

NOT, !

Contents

  1. Syntax
  2. Description
  3. Examples

Description

Logical NOT. Evaluates to 1 if the operand is 0, to 0 if the operand is non-zero, and NOT NULL returns NULL.

By default, the ! operator has a higher precedence. If the HIGH_NOT_PRECEDENCE SQL_MODE flag is set, NOT and ! have the same precedence.

Examples

SELECT NOT 10;
+--------+
| NOT 10 |
+--------+
|      0 |
+--------+

SELECT NOT 0;
+-------+
| NOT 0 |
+-------+
|     1 |
+-------+

SELECT NOT NULL;
+----------+
| NOT NULL |
+----------+
|     NULL |
+----------+

SELECT ! (1+1);
+---------+
| ! (1+1) |
+---------+
|       0 |
+---------+

SELECT ! 1+1;
+-------+
| ! 1+1 |
+-------+
|     1 |
+-------+

Comments

Comments loading...
Content reproduced on this site is the property of its respective owners, and this content is not reviewed in advance by MariaDB. The views, information and opinions expressed by this content do not necessarily represent those of MariaDB or any other party.